On 2020-11-19 20:27, Norman Ramsey wrote:
 > I've got a Lua filter that is meant to render certain document 
elements in
 > a `boxedminipage` environment.  To accomplish this feat, I give the 
element
 > in a suitable `div`, and a Lua filter inserts the LaTeX environment.  The
 > document itself remains universal, but the Lua filter is resolutely
 > intended for LaTeX.
 >
 > The filter adds a raw `\usepackage{boxedminipage2e}` to the
 > `header-includes` of the metadata, but unfortunately when `-V
 > header-includes=...` appears on the command line, it takes precedence and
 > the document metadata is ignored.

However you can, if the filter appends any includes done in
the filter to any existing meta.header-includes list combine it with
header-includes defined in a *metadata file* via
option --metadata-file=FILE or metadadata-files: in a defaults file
using the usual idiom:

`````````yaml
header-includes:
- |
   ````{=latex}
   \usepackage{relsize}
   ````
`````````

Alternatively you may even have a filter collect files and inject their 
contents
into the metadata header includes.

Two proof-of-concept filters attached:

1.  `inject-includes.lua` shows how you may inject includes dynamically in a
     filter, either creating the meta.header-includes list or appending 
them to
     an existing one.
2.  `inject-includes-files.lua` shows how you may inject the contents of 
a directory
     `header-includes` into the meta.header-includes list and thus get 
the best
     of both worlds! :-)

-- 
You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/3648902d-0ed0-be10-02c6-e5527d6eaaa4%40gmail.com.